I get a boatload of these kind of warnings:
bug nHBL=260 132097 259 -511
on console when booting (WinUAE CPU) Falcon emulation
with TOS v4, or running some graphical Falcon programs:
hatari --machine falcon --tos tos404.img .
If I boot Falcon emulation with latest EmuTOS,
I don't see these warnings.

this should be fixed now ; blitter cycles were not shifted to account
for 16/32 MHz, which caused some inconstancies when updating internal
interrupts.